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Sharks (White Star Guides)

Sharks (White Star Guides) : Surrounded by an aura of mystery and fear, sharks are the uncontested lords of all the seas on the planet. Represented by over 350 known species and by others yet to be discovered, sharks are the result of an evolutionary process that began about 250 million years ago. This volume, complete with drawings, graphics, and photographs and offering a series of cognitive-species cards, is dedicated to the history and biology of these highly specialized ocean predators that combine primitive character traits with behavior typical of superior vertebrates.